how to generate random point inside a sphere
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I am trying to generate random points inside a sphere given the radius and the center. If anyone has a sample code or can help me with this, thanks for the help.
采纳的回答
R = 3; % radius of the sphere
Xc = 4;
Yc = -4;
Zc = pi; % (Xc,Yc,Zc) center of the sphere
rval = 2*rand(1)-1;
elevation = asin(rval);
azimuth = 2*pi*rand(1);
radius = R*(rand(1))^(1/3);
[x,y,z] = sph2cart(azimuth,elevation,radius);
x=x+Xc
y=y+Yc
z=z+Zc
更多回答（2 个）
Najwa Yaminah
2020-1-17
编辑：Staff 33
2020-5-13
I have an assignment so I try the following code :
function getPoint() {
var d, x, y, z;
do {
x = Math.random() * 2.0 - 1.0;
y = Math.random() * 2.0 - 1.0;
z = Math.random() * 2.0 - 1.0;
d = x*x + y*y + z*z;
} while(d > 1.0);
return {x: x, y: y, z: z};
}
This works well as you can see
1 个评论
John D'Errico
2020-1-28
Sigh. Of course, you posted this answer as Python code, when MATLAB code was needed.
Patricia Sperry
2019-9-21
编辑：Staff 33
2020-5-13
Floow this method for generating the random points on sphere. I have also used this method for doing my work for the project.
Do try this code:
TH = 2*pi*rand(1,1e4);
PH = asin(-1+2*rand(1,1e4));
[X,Y,Z] = sph2cart(TH,PH,1);
plot3(X,Y,Z,'.','markersize',1)
axis equal vis3d
2 个评论
darova
2019-9-21
I like how it looks like but all points are on sphere surface (not inside)
I think random radius should be added
DGM
2024-2-23
Considering that I just deleted 8 other junk answers used for spam links, something tells me that these answers were also spam but have since had their links removed. That might explain why they're not relevant to the question.
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